Lower end construction for fiber drums



Jun@ 9 3.957 w. J. @ELST LowRR END CONSTRUCTION RoR FIBER DRUMS FiledFeb. 8, 1956 INVENTOR WR'ZZzam LZ Gezls LOWER END CONSTRUCTION FOR FIBERDRUMS Appnaon Febr-'tiny 8,1956, serial No. 564,219

claims. (ci. 22a-5.6)

'Ihis invention relates to drums and Vthe'like of the general type inwhich a sheet metal bottom is seamed to a side wall constructed from berboard. Such drums have long been provided with metal reinforced seam andchime structures to guard againstinjuryV during rough handling andshipment but such structures have not been altogether adequate;

The present invention aims to provide a new and irnproved constructionwhich will possess greater strength yet may be inexpensively andexpeditiously manufactured.

One of the primary objects of the invention is to provide a novelseamstructure for joining a sheet metal bottom to a ber drum body whichwill not tend to open up or rupture when the seam is struck unevenly, asmay occur when a drum with contents is dropped in a tilted position;

A further object, which is a corallary of the preceding A)States Patent@objective, is to provide a seam -construction of the characterhereinafter described in which the compressed constituents of the seamstructure are again subjected to compression when a drum with contentsis dropped onto its bottom from an elevated position.

In carrying out the above end, a further object is to provide a novelconstruction in which the lower end portion of the drum wall has abreast, an internal circumferential reinforcing rib at the lower end ofsaid breast, and a box seam and chime structure below said rib, saidseam and chime structure being covered by reinforcing metal which alsoextends upwardly and conforms to the outer side of said rib and breast.

Another object is to provide a novel construction in which the abovementioned reinforcing metal is integral with the drum bottom, theperipheral portion of the latter being multi-directionally bent in anovel man-ner to form elements of the seam and chime structure and thento provide the required reinforcements.

A further object is to provide a novel seam and chime structure whichincludes three thicknesses of fiber board and six thicknesses of metal,for unusual strength.

A still further object is to so include either the lower end portion ofa drum wall liner as the peripheral por tion of a bottom liner, or bothof said portions in the seam and chime structure as to provide strongliner anchorage and tight sealing.

With the above and other objects in View that will hereinafter appear,the nature of the invention will be more clearly understood by referenceto the following detailed description, the appended claims and theseveral views illustrated in the accompanying drawing.

In the drawing:

Figure l is a side elevation of the lower end portion of a drumconstructed in accordance with the invention.

Figure 2 is an enlarged vertical sectional View on line 2 2 of Figurel.v

Figure 3 is a similar view showing a bottom liner in addition to thewall liner of Figure 2.

Patented June 4,1957

ICC

Figure 4 is a similar view showing a construction having no liner.

The lower end portion of the ber drum wall 5 curves inwardly to form abreast 6, then turns downwardly and outwardly to form a channeledinternal reinforcing rib 7, and then extends outwardly to provide anupper, annular channel wall 8; From this upper channel wall 8, the lowerportion of the drum wall turns downwardly and inwardly to form awall-connecting' portion 9, and then extends inwardly to provide alower, annular channel wall 10 closely underlying the upperv wall 8.The'lower end portion of the drum wall then turns downwardly to form aange-carrying portion 11, and nally extends out-` wardly to provide anannular ange 12 which closely underlies the lower channel wall 10 andvis preferably of about half thewidth thereof.

' A sheet metal bottom 13 is provided. The'peripheral portion of thisbottom Ais folded downwardly and inwardly upon itself at 14 to provide atwo-ply formation 15 which is tightly received in the channel betweenthe upper and lower walls 8 and 10. .The sheet metal then turnsdownwardly at 16 against the ange carrying portion 11 and thenextendsoutwardly at 17 against the lower side of the ange 12. Themetalturns upwardly at 18 around the outer edge of thev flangel 12 andthen extends inwardly at 19 upon the latter: The metal is then foldedupwardly'and outwardly' upon itself at 20 and then extends outwardly at21 against vthe lower side of the lower channel wall 1li.' The metalthen turns upwardly and inwardlyat 22 around the wall connecting portion9 and extends inwardly at 23 upon the upper channel wall 8. The metallthen turns-upwardly and outwardly at 24 against the outer sideo'f'thechanneledrib 7 and finally curves outwardly and upwardly at 25 againstthe breast 6. The construction above described provides an unusuallystrong box seam and chime structure tenaciously securing the fiber drumwall 5 and the sheet metal bottom 13 together and capable ofwithstanding severe impacts without loosening or serious deformation.Also the portion of the drum wall 5 immediately above this seam andchime structure is effectively stiened and reinforced by the breastformation 6 and the rib 7, and the metal 25, 24 surrounding the same.This construction provides some resiliency to aid in absorbing shocksand it also effectively resists penetration and puncture.

In Figures 2 and 3 the drum wall 5 includes a liner 26 which may be ofpolyethylene, Saran, Pliolm or other type of film. The lower portion ofthis liner conforms at 27 and 28 to the breast 6 and rib 7, and itextends outwardly at 29 at the lower side of the upper channel wall 8,downwardly and inwardly at 30 around the fold 14, inwardly at 31 at theupper side of the lower channel wall 10, downwardly at 32 at the innerside of the ange carrying portion 11 and outwardly at 33 at the lowerside of the ange 12.

In Figure 3, the bottom 13 also includes a liner 34. The peripheralportion of this liner follows the portions 29, 30, 31, 32 and 33 of thewall liner 26. A corresponding bottom liner may of course be usedwithout a wall liner, if desired.

By including the lower portion of the wall liner 26 or the peripheralportion of the bottom liner 34, or both of said liner portions, in theimproved box seam and chime construction, strong liner anchorage andtight sealing are accomplished. Moreover, the construction well protectsthe liner against rupture.

From the foregoing, it will be seen that novel and advantageousconstruction has been provided for attaining the desired ends. Attentionis invited, however, to the possibility of making variations within thescope of the invention as claimed.

I claim:

1. A tber drum wall having its lower end portion curved inwardly to forma breast, then turned downwardly .and outwardly l to forni `afchanneledinternal rib, then extended outwardly to form an upperannular :channelwall, :then turned downwardlyand inwardly ;to 'pro vide a wallconnectingportion, then extended inwardly to form a lowerannular channelwallLwhichclosely'underliesrsaid upper vannular channel wall, :then'turned downwardly to form a ange carrying portion, and finally turnedoutwardly to form an.annular ange which closely underlies said lowerannular wall; and a sheetmetal bottom having its vperipheral portiontightly freceived .between said upper and lower annularwalls,;-said.sheet metal bottom having integral portions Vwhich :tightlyengage said iiange carrying portion, said annularxtiange, .said .upperand lower annular walls, said :wall connecting portion, said channeledrib and .said breast.

2. A ber drum wall having Kits lower end portion curved inwardly to.form a breast, then turned .downwardly and outwardly to form achanneled rinternal rib, then extended outwardly to form an'upperannular channel wall, then turned .downwardly .and inwardly to .providea wall-connecting portion, then .extended inwardly to form a lowerannular channel wallwhich closely underlies said upper annular channelwall, .then turned downwardly to form a flange .carrying portion, and'inally turned outwardly to form an annularange whichclosely underliessaid lower iannular wall; and a sheet metal bottom having its peripheralportion vfolded Ndownwardly and inwardly upon itself to `form a two-plyformation which is tightly received in the channel between said upperand lower annular channel walls, :the metal being then turned downwardlyagainst said flangecarrying .portion and thenextended outwardly against:the flower side of said annular llange, the metal being then turnedupwardly around the outer edgeof said ange and extended inwardly uponthe latter,..the .metal .being then folded upwardly and outwardly uponitself and extended outwardly against the lower side of said upper wall,the metal being then turned upwardly and inwardly around said wallconnecting portion and extended inwardly upon said upper wall, the metalbeing then turned upwardly and outwardly against the exterior of saidchanneled rib and being finally curved outwardly and upwardly againstsaid breast.

3. A structure as specified in claim l, in which said drum wall includes'a liner extending downwardly against the inner sides of said breast andrib, said liner extending outwardly at the upper side of said peripheralportion of said bottom, being folded inwardly around the outer edge ofsaid peripheral bottom portion, then extending inwardly at the lowerside of 'said peripheral bottom portion, then extending downwardly atthe inner side of said flange carrying portion and then extendingoutwardly at the flower sideof said ange.

4. A structure .as specilied in claim l, in which said bottom includes aliner, the .peripheral portion of said liner being extended outwardly atthe lower side of said upper channel wall, theirdownwardly and inwardlyat the vupper side of said lower .channel wall, then downwardly at theinner side of said ange carrying portion, and then outwardly at thelower side of said flange.

5. A structure as .specified in claim l, vin which said drum wall andsaid bottom include ra wall liner and a bottom liner respectively, saidliners jointly extending outwardly .at the upper side .of said.peripheral .portion of said. bottom, being folded .inwardly around the.outer edge .of said Aperipheral bottom portion, then extending inwardlyat the vlower side of said peripheral bottom portion, then extendingdownwardly at the inner side of said flange Acarrying .portion iand thenextending ,outwardly at .the lower side of -said ange.

.No references cited.

